Telemotor



R. MAcGREGOR.

TELEMOTOR.

APPLICATION men was. 19m.

Patented May 18,1920.

2 SHEETSSHEET 1- R. MACGREGOR.

TELEMOTOR.

APPLICATION FILED AUG-6, 191a.

Patented May 18,1920.

2 SHEETS-SHEET 2- 14? Jr f ,,,r, k 9 a q 0 ROBERT MACGREGOR, 0F PORT-GLASGOW, SCOTLAND.

TELEMOTOR.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed August 6, 1918. Serial No. 248,653.

T 0 all wlwm it may concern Be it known that I, ROBERT MAoGREoon, MacGregors Port- Glasgow Engineering Works Limited, Port- Glasgow, Renfrewshire, Scotland, a subject of the King of Great Britain, have invented a certain new and useful Improved Telemotor, of which the following is a specification.

This invention relates to telemotors of the type in which movable vanes are used and a liquid is used as the actuating medium.

Preferably I employ, in known manner, two similar devices the one (which I may term a transmitter) for transmitting motion to the other (which I may term a receiver).

Under my invention the transmitter is cylindrical and has movable balanced or double action vanes which work in oppositely disposed liquid chambers and are adapted to force liquid through a pipe con nection to, or to displace liquid in, the receiver in which the liquid, in its turn, moves a vane (or vanes) and turns a member hav ing an indicating pointer or other indicating device connected therewith, if the invention is to be used for an indicator, or a ships telegraph, or the like, or, otherwise, to operate means for controlling, regulating and other purposes. Thereceiver acts in a complementary manner to the transmitter.

Preferably both devices are made in the form of a cylindrical box or casing in which there are two fixed segmental abutments and two liquid chambers. There is a rotatable member at the center of the cylinder from which projects two radial arms or vanes one working in each of the chambers aforesaid so that there is a double action with equal pressure on the vanes. Means, such 'as a reservoir connected by a pipe, or the like, with a central passage in the rotatable member, is provided for supplying liquid (through a non-return valve) to the chambers and keeping them constantly filled. The chambers of the receiver and transmitter are connected by ports and pipes or passages in such manner that, as the liquid is moved by the vanes of the transmitter a corresponding movement is imparted to the vanes of the receiver the liquid being in a closed circulatory system.

The invention is very suitable as a rudder indicator for ships in which case the transmitter is located near the rudder post and its rotatable member is connected, by means of an arm and link or other gear, to an arm or helm on the rudder post in such manner that, as the rudder moves from side to side, it causes corresponding movements of the rotatable member which movements may be indicated by means of a pointer connected to the member'and arranged to work over a dial plate on the device. As the rotatable member moves, the vanes connected with it also move and, consequently, cause the liquid to circulate and actuate the vanes of the receiver which may be located on the bridge, in the captains cabin, or elsewhere, and cause the rotatable member of the receiver to indicate the position of the rudder or helm by means of a pointer working over a dial. In this way the captain, or other officer, can, at a glance, note exactly the position of the rudder or helm at any moment.

The telemotor while being specially adapted for rudder indicators, engine room telegraphs and for other purposes where indications or signals have to be given is equally suitable for operating controlling valves, gears, switches, etc.

On the drawings annexed I have shown, by way of example, the invention as carried out in connection with a ships helm indicator.

Figure 1 is aplan view of the indicator.

Fig. 2 is a view of the transmitter with the cover removed.

Fig. 3 is a cross section taken through the transmitter on the line 3-3, Fig. 2.

The transmitter and receiver are similar in construction and consequently the description of the transmitter will, at the same time, serve as a description of the receiver.

The transmitter comprises a cylinder or casing a in which there are two fixed segmental abutments Zi, c, and two liquid chambers e, f. At the center is a rotatable member 9 having two radial vanes or arms 9 adapted to work in the chambers f and e respectively. The rotatable member 9 has a reduced upward extension 9 which projects through the cover a of the cylinder and works tight through a stuffing box 9*. Keyed to the part 9 is an arm h which is connected, by means of a link i, with the short arm or helm j on the top of the rudder post 70 in such manner that the movements of the helm j are communicated to the arm h and the vanes g 9 On the part 9 is a pointer m which works over a graduated plate or dial a supported on a bracket 0 secured to the cover a of the cylinder. The

chambers e, f, are kept filled with liquid from a vessel located in any suitable posi tion near the transmitter and communicating with it by means of a pipe (with nonreturn valve therein) which leads to a central passage 3) in the rotatable member 9. The liquid passes from the passage 1? through the ports 9, 7", indicated in dotted lines, Figs. 2 and 3 to the chambers e, f. s is the receiver and the chambers e, f, of the transmitter and receiver are in communication by means of pipes as follows:The chambers e and 7 of the transmitter, at one side of the vanes communicate, by means of the pipe 6 and the branch pipe 6 with the corresponding pipe 6 of the corresponding receiver chambers. The chambers of the transmitter, at the other side of the vanes, communicate, by means of the pipe f and branch pipe 7 with the corresponding pipe f and corresponding chambers in the receiver s. The rotatable member s (corresponding to 9 of the receiver 8 has a pointer m which works over a graduated dial or plate 02 similar to the plate a.

It is obvious that as the vanes move from side to side in the chambers e, f, they will, the chambers and the vanes being similar, work with a balanced action and cause the liquid to move in the pipes 6 f and effect corresponding movements on the vanes of the receiver and consequently the pointer m will move in a manner complementary to the pointer m.

P and S on the dials refer to port and starboard.

There may always be two vanes and two chambers in the cylinder 8 as in the cylinder a, but, in some cases, if desired, only one vane and one chamber may be employed in the cylinder 3, the liquid areas in the cylinder being arranged accordingly.

Having now fully described my invention what I claim and. desire to secure by Letters Patent is:

1. A telemotor with liquid as the actuating medium comprising a transmitter consisting of a cylindrical casing divided by partitions into two compartments each containing liquids, movable balanced double action vanes therein, a member common to the vanes for moving the same, a receiver, compartments in the receiver, means establishing communication for liquid between the compartments of the transmitter and the receiver, and an indicator on the receiver operable by movements of the liquid in the transmitter.

2. A telemotor with liquid as the actuating medium, comprising a transmitter consisting of a circular chamber divided by partitions into two segmental compartments each containing liquid, oppositely disposed movable balanced double action vanes one in each compartment, a central member connected with and capable of moving the vanes, a receiver, compartments in the receiver, means establishing communication for liquid between the compartments of the transmitter and the receiver, and an indicator on the receiver operable by movements of the liquid in the transmitter.

3. A telemotor with liquid as the actuating means, comprising a transmitter and a receiver both of similar construction and each comprising a cylindrical casing divided by partitions into two chambers, a central member with radial arms oppositely disposed and capable of moving in said chambers, means for supplying liquid to the chambers, means whereby when the radial arms of the transmitter are moved the corresponding radial arms of the receiver will also be moved, and indicator means moved by the radial arms.

4:. A tel'emotor with liquid as the actuating means, comprising a cylindrical casing divided by partitions into two chambers, a central member with radial arms oppositely disposed and capable of moving in said chambers, means for supplying liquid through said central member to the chambers, a second cylindrical casing divided by partitions into two chambers, a central member with radial arms oppositely disposed and movable in said last mentioned chambers, pipe connections connecting the chambers of both casings, means for moving the central member of the first casing and indicator means moved by the central member of the second casing.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT MACGREGOR.

Witnesses:

HUGH D. FrrzrATnIoK, MARY GREEN. 

